<template>
  <div class="app-container">
    讲师添加

    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="eduTeacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="eduTeacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="eduTeacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="eduTeacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="eduTeacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
          <!-- 头衔缩略图 -->
          <pan-thumb :image="eduTeacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>
          <!--
          v-show：是否显示上传组件
          :key：类似于id，如果一个页面多个图片上传控件，可以做区分
          :url：后台上传的url地址
          @close：关闭上传组件
          @crop-upload-success：上传成功后的回调 -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/eduoss/fileoss'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
        </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  components: { ImageCropper, PanThumb },
  data(){
    return{
      eduTeacher: {
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: ''
      },
      //是否禁用按钮
      saveBtnDisabled:false,
      //上传弹框是否显示
      imagecropperShow:false,
      //上传组件唯一标识
      imagecropperKey:0,
      //dev.env.js里的地址
      BASE_API:process.env.BASE_API
    }
  },
  created(){
    this.init()
  },
  watch:{
    $route(to, from){
      this.init()
    }
  },
  methods:{
    //关闭上传弹框
    close(){
      this.imagecropperShow = false
      this.imagecropperKey = this.imagecropperKey + 1
    },
    //头像上传成功
    cropSuccess(data){
      this.imagecropperShow = false
      //返回图片地址
      this.eduTeacher.avatar = data.url
      this.imagecropperKey = this.imagecropperKey + 1
    },
    init(){
      //判断路径中是否有id值
      if (this.$route.params && this.$route.params.id) 
      {
        const id = this.$route.params.id
        this.getTeacherInfo(id)
      }
      else
      {
        //清空teacher内容
        this.eduTeacher = {}
      }
    },
    //根据ID查询讲师
    getTeacherInfo(id){
      teacherApi.getTeacherById(id)
        .then(response => {
          this.eduTeacher = response.data.teacher
        })
    },
    saveOrUpdate(){
      if (!this.eduTeacher.id)
      {
        //添加
      this.saveTeacher()
      }
      else
      {
        //修改
        this.updateTeacher()
      }
    },
    //添加讲师
    saveTeacher(){
      teacherApi.addTeacher(this.eduTeacher)
        .then(response => {
          //提示信息
          this.$message({
            type: 'success',
            message: '添加成功!'
          })
          //刷新页面
          this.$router.push({path:'/teacher/management'})
        })
    },
    //修改讲师
    updateTeacher(){
      teacherApi.updateTeacherInfo(this.eduTeacher)
        .then(response => {
          //提示信息
          this.$message({
            type: 'success',
            message: '修改成功!'
          })
          //刷新页面
          this.$router.push({path:'/teacher/management'})
        })
    }
  }
}
</script>